Excavate the top 5 cards of your Deck, then if you excavated a "Krawler" monster or a "World Legacy" card, add 1 of them to your hand, also send the remaining cards to the GY. Otherwise, shuffle all excavated cards into the Deck. For the rest of this turn after this card resolves, you cannot Special Summon monsters from the Extra Deck, except Link Monsters. You can only activate 1 "World Legacy Survivor" per turn.